76 lines
2.0 KiB
Rust
76 lines
2.0 KiB
Rust
use crate::UiRsc;
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use super::*;
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use std::marker::Unsize;
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pub trait WidgetLike<Rsc: UiRsc, Tag>: Sized {
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type Widget: Widget + ?Sized + Unsize<dyn Widget>;
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fn add(self, rsc: &mut Rsc) -> WeakWidget<Self::Widget>;
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fn add_strong(self, rsc: &mut Rsc) -> StrongWidget<Self::Widget> {
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self.add(rsc).upgrade(rsc)
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}
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fn with_id<W2>(
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self,
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f: impl FnOnce(&mut Rsc, WeakWidget<Self::Widget>) -> WeakWidget<W2>,
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) -> impl WidgetIdFn<Rsc, W2> {
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move |state| {
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let id = self.add(state);
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f(state, id)
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}
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}
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fn set_root(self, rsc: &mut Rsc, root: &mut impl HasRoot) {
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let id = self.add_strong(rsc);
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root.set_root(id);
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}
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}
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pub trait HasRoot {
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fn set_root(&mut self, root: StrongWidget);
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}
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pub trait WidgetArrLike<Rsc, const LEN: usize, Tag> {
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#[track_caller]
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fn add(self, state: &mut Rsc) -> WidgetArr<LEN>;
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}
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impl<Rsc, const LEN: usize> WidgetArrLike<Rsc, LEN, ArrTag> for WidgetArr<LEN> {
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fn add(self, _: &mut Rsc) -> WidgetArr<LEN> {
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self
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}
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}
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// variadic generics please save us
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macro_rules! impl_widget_arr {
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($n:expr;$($W:ident)*) => {
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impl_widget_arr!($n;$($W)*;$(${concat($W,Tag)})*);
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};
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($n:expr;$($W:ident)*;$($Tag:ident)*) => {
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impl<Rsc: UiRsc, $($W: WidgetLike<Rsc, $Tag>,$Tag,)*> WidgetArrLike<Rsc, $n, ($($Tag,)*)> for ($($W,)*) {
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fn add(self, rsc: &mut Rsc) -> WidgetArr<$n> {
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#[allow(non_snake_case)]
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let ($($W,)*) = self;
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WidgetArr::new(
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[$($W.add(rsc).upgrade(rsc),)*],
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)
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}
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}
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};
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}
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impl_widget_arr!(1;A);
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impl_widget_arr!(2;A B);
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impl_widget_arr!(3;A B C);
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impl_widget_arr!(4;A B C D);
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impl_widget_arr!(5;A B C D E);
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impl_widget_arr!(6;A B C D E F);
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impl_widget_arr!(7;A B C D E F G);
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impl_widget_arr!(8;A B C D E F G H);
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impl_widget_arr!(9;A B C D E F G H I);
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impl_widget_arr!(10;A B C D E F G H I J);
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impl_widget_arr!(11;A B C D E F G H I J K);
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impl_widget_arr!(12;A B C D E F G H I J K L);
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